Munandar, A., and I. Darmawan. “COMPARATIVE STUDY OF GROSS PROFIT MARGIN AND NET PROFIT MARGIN AT THE TOBACCO COMPANIES PT GUDANG GARAM TBK AND PT HM SAMPOERNA TBK”. Jurnal PenKoMi : Kajian Pendidikan Dan Ekonomi, Vol. 7, no. 2, June 2024, pp. 45-53, doi:10.33627/pk.v7i2.1949.